It's highly dependent on performance since quants are tied directly to a PnL number. If that number is really, really good they're making millions. More average quants are still making a premium over senior SWEs, underperforming quants don't stay quants for long.
This all varies firm to firm though, especially depending on what kind of trading they do.
This all varies firm to firm though, especially depending on what kind of trading they do.